Pulsation Damper with Magnetic Position Sensor
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Solution Overview
Problem
Existing pulsation dampers for pulse-type delivery pumps have complex regulation mechanisms for membrane position control, which can lead to inefficiencies and potential membrane damage from excessive peak loads.
Innovation Solution
A pulsation damper with a rod connected to the membrane featuring a permanent magnet and a position measuring device, protected inside the container, which interacts with a sensor to adjust the pressure chamber pressure via solenoid valves, and a conical membrane design with metal disc and base sections to prevent overloading, ensuring the membrane rests flat on contact surfaces for protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a complex regulation mechanism is used for membrane position control, then the membrane position can be controlled more precisely, but the device complexity increases and reliability decreases
Solution Approach 1:
The patent replaces complex mechanical regulation mechanisms with a magnetic field-based position sensing system. A permanent magnet attached to the membrane interacts with a position sensor (such as a Hall effect sensor or magnetic field sensor) to detect membrane position non-contactually. This substitution of mechanical systems with magnetic/electronic systems simplifies the regulation mechanism while maintaining precise position control capability.
Solution Approach 2:
The patent introduces a permanent magnet as an intermediary element that mediates between the membrane position and the position sensor. The magnet serves as a non-contact interface that translates membrane displacement into detectable magnetic field changes, enabling precise position measurement without direct mechanical contact or complex linkages.
2Productivity
If the membrane is allowed to move freely to compensate for pressure variations, then the pulsation damping performance is improved, but the membrane may be damaged by excessive peak loads
Solution Approach 1:
The patent implements a feedback control system where the position sensor continuously monitors the membrane position and provides this information to a control device. The control device processes the position signal and actuates switching valves or vent valves to regulate pressure chamber pressure, thereby controlling membrane position. This feedback mechanism allows the membrane to move freely for pulsation damping while preventing excessive displacement that could lead to damage.
Solution Approach 2:
The patent creates a dynamically adjustable system where the pressure chamber pressure can be actively regulated in response to real-time membrane position feedback. The control system dynamically adjusts pressure to maintain the membrane within safe operational limits while allowing sufficient movement for effective pulsation damping, adapting to varying operating conditions.
3Ease of operation
If the position sensor is placed outside the container for easy access, then the ease of operation is improved, but the sensor is exposed to harsh environmental conditions reducing reliability
Solution Approach 1:
The patent nests the position sensor inside the container, placing it within the protected environment where it can directly detect the permanent magnet on the membrane. The sensor is integrated into the internal structure of the pressure chamber assembly, shielded from external harsh conditions while maintaining measurement capability. This nested configuration prioritizes sensor protection and measurement accuracy over external accessibility.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design simplifies membrane position regulation, protects the membrane from peak loads, and ensures accurate pressure adjustment within the pressure chamber, enhancing the stability and reliability of pulsation damping.
Implementation Method 1
a rod which extends axially in the pressure chamber and holds at least one permanent magnet is connected to the membrane. There is a position measuring device that interacts with the permanent magnet and generates an actual value for the position of the membrane
Implementation Method 2
The actual value is compared in the control device with a set value for the purpose of actuating the switching valve or a vent valve depending on the control deviation
Implementation Method 3
The pressure in the pressure chamber is adjusted to around 0.6 MPa operating pressure, so that higher pressure loads during delivery are dampened by compressing the gas in the pressure chamber
Data Source
Figure 1~2
AI summary
The pulsation damper (10) for a feed pump has a housing with a flexible membrane closing one end and defining a pressure chamber (24) of variable volume The chamber is connected to a gas source by a switching valve. The membrane has a position adjuster to allow movement between end positions dependent on the fluid pressure. The membrane is connected to a rod which carries a permanent magnet and there is a sensor to determine the membrane position and alter the switching valve or vent valve to regulate the membrane.